Lichtstark, valuable and small Available now quite inexpensive.

I still, for the price of 89 upscale this lamp - acquired.
A lamp that really stands out from the vast mass of LedLenser series, reflecting the lights down to small details often hardly be distinguished.

Was excited by the at that time the highest possible light output from a single CR123A battery! There was hardly comparable lamps with a maximum of 400 lumens from a 3-volt lithium battery on the market. Probably for RCR123 battery. For batteries turn this lamp is not suitable.

The torch is in view of the battery assembly very small and light. Good handling is quite possible despite small size. A clip, a loop, the Duracell battery, a small brush a Putztüchlein and a replaceable front ring in stainless steel, which can also appear optically high-quality in my opinion, the lamp is in the retention Schächtelchen appealing held here.

The build quality is absolutely top quality.
Is switched by a switch on the back of the Batterieverschraubung which serves as well-functioning by Chock been translated hexagon. It's only full light output, reduced light output with about 85 lumens and actually unusable strobe mode available momentary half-pressed and when the switch is in solid circuit. But that's a matter of opinion.

In daily practice, a few steps and start are at maximum light output while helpful. The jump from 85 to 400 lumens is significantly too large. In between, at least one further stage is missing.
There is no dimmer or memory circuit which would mean it would always start the lamp in the light intensity last selected. So must always only switched through to get to the second reduced stage. The flashlight is always started in Hell.
Switching to small light level is a bit cumbersome, because this has to be made and cycled fast at half the switch position. This, at best, less than one second.
In addition, it does not work every time if it has to be fast, like once. On this type of light levels choice I could still not get used properly because I know that many other manufacturers it can much better !!

Unlike the usual "uniform look" of Led Lenser series (as mentioned above) is the F1 visually but a welcome change. In F1 there is no adjustable reflector with at Led Lenser often mandatory, known as very unpleasant for many users light rings, depending on the head position.
The photograph at the F1 is first class clean and optimized for close environment take on high beam range. The daily practice is the range illumination maybe closer.
Due to the extremely high power consumption from a battery but also arises only a maximum burn time of 2 hours up to a maximum aperture of only 1 lumen measured.

A rather unrealistic value. This means in practice that electronically in stages significantly decreases the brightness after a maximum of 20-30 minutes, held in stages and is down-regulated. It would be better to specify ANSI-F1 standard, or 400 lumens for X minutes, then, etc. How long the lamp remains Y lumens for X minutes in maximum light intensity, it is not apparent from the datasheet concise. Experience has shown that there are at LedLenser never more than 3 to a maximum of 5 minutes at a time. Further switching to full light level requires another turn on the lamp, as long as the battery still has power reserves.
A temperature sensor to protect against overheating of the LED chip is present. This temperature control I wish in many high-quality flashlights way also; is probably clear, but in the price range below 100 - can not be realized.

The use of 4.2 volt battery does not allow the manufacturer, as briefly touched on above, unfortunately. The flashlight does not switch on the high voltage or the driver would be destroyed, which is why I will not go into this.

Despite the minor shortcomings in the circuit concept, lack of memory function and last but not least consequent lower burn time, there are still a buy recommendation from me!

Thank you that you have read this far in the hope I could contribute something to your purchasing decision or general informational content.
Thank You Very Much. :)